Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Click images to enlarge and show more photo credit.

Key to Petunia

Solanaceae

Petunia

Copy permalink to share

1 Corolla funnelform, white, pale pink, or purple (drying deep violet).
  2 Corolla white to pale pink, without bulge
  2 Corolla purple, with slight bulge